Self-feeding stove.



'UN 1F S ADALBERT KUEZWERNHART, OF VIENNA, AUSTRIA-HUNGARY, ASSIGNOR TO ERNST REITLER, OF VIENNA, AUSTRIA-HUNGARY.

SELF-FEEDING STOVE.

T 0 all whom it may concern:

Be it known that I, ADALBERT KURZWERN- HART, gentleman, a subject of the Emperor of Austria Hungary, and residing at X111. /4 Hochsatzengasse 18, Vienna, in the Empire of Austria-Hungary, have invented new and useful Improvements in Self-Feeding Stoves, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which they appertain to make and use the same.

The invention relates to heating stoves and more particularly to self-feeding stoves section along the line I-I of the Fig. 5;

Fig. 2 is a vertical section through the central piece containing the fuel chamber and the combustion chamber along the line II-II of the Fig. 1, viewed from the front of the stove; Fig. 3 represents another vertical section through the central part along the line lll- IH of Fig. 1 and looked upon from the back part of the stove. Fig. 4 is a plan view upon the bottom part of the stove containing the ash-pit and Fig. 5 is a cross section through the stove along the line V*V of Fig. 1.

The primary air enters the stove through a horizontal channel 1, the bottom part of which is provided with a register 35 for the regulation of the air supply. A vertical channel S arranged alongside the fuel chamber 6 (Figs. 3, 4 and 5) is connected with the channel 1 and communicates at its upper l end with the fuel chamber 6 by an opening 5. The upper end of the fuel chamber 6 communicates by another opening 4 with a second vertical channel 7 situated alongside the opposite side of the chamber and leading into the ash-pit 18, below the grates 8 and 9. The channels 1, 3, 7 and the passages 4 and 5 constitute the primary air con- Sp'ecicaton of Letters Patent.

Application filed January 7, 1907.

In the drawings: Figure 1 is a vertical Patented June 27, 1911. Serial No. 351,212.

duits and have not only to cool the chamber 6 by means of the air which passes through these channels but also to carry away, through the channel 7, gases, rising from the combustibles in a sufficiently rarefied and ineXplosible condition so that eX- plosions4 are prevented. The secondary air enters also at the bottom part of the stove into another horizontal channel 2 and rises in the inclined passage 30, Fig. 2, to the long slot 31 in the back wall of the stove, through which it is discharged into the combustion chamber of the stove. The channel 2 is located at the side of the bottom part so that the secondary air is heated by the heat of the ash-pit 13, and on account of the upwardly arranged passage 30 a draft is produced whereby the air is carried into the combustion chamber. Both the horizontal air-supply channels 1 and 2 are arranged laterally, in order firstly to prevent the ashes from falling down out of the door of the ash-pit upon the registers and secondly to diminish the height of the stove. The front ends of the channels 1 and 2 are covered by caps 34, 34 which may be easily re moved in order to clean said channels of any ashes, cinders or pieces of coal.

Sometimes it is impossible to ignite the fuel, especially if such a small quantity of fuel has been brought into the stove that a free space is left between the grate 8 and the fire-proof stone 26 which is arranged between the fuel chamber 6 and the combustion chamber 15 on the lowermost end of the partition 11; in this case the air flows freelv through the space left between the grate and the baille stone without passing through the fuel because, even if the registers 35, 35 of the two channels 1, 2 are closed and the door 12 of the ash-pit is opened, the air rises through the Hue 7, enters the fuel chamber 6 from above and, passing downwardly, escapes through the space left between the fuel supported by the grate 8 and the stone 26 arranged below the partition. The same way the air takes if the fuel chamber 6 is not suliiciently filled and the fuel does not offer sufficient resistance against the passage of the air. Therefore according to the present invention the chamber 6 may be closed by a sliding damper 14 (Fig. If the sliding damper 14 (Fig. 3) closes the opening 4 (Fig. 1) and the channels 1 and 2 are shut while the door 12 of the ash-pit is opened, the fuel may be readily ignited because then the air has no other way but through the fuel all other passages being shut. The sliding damper 14 may also be closed if it is desired to burn all the fuel contained in the stove, because finally it will contain a small pile of fuel and the condition will be similar to that one mentioned above.

In order to prevent a dry distillation of the fuel contained in the chamber 6 and a development of gases by the heat of the combustion gases rising up in the combustion chamber 15, the walls 11 and 24 are spaced apart and inclose a cavity 16. Moreover the wall 24 may be covered by fireproof material 25 or the wall 11 may be ireproof on that side which is turned toward the fuel chamber. To perfectly isolate the fuel chamber by a layer of air, the cavity is extended forward above the top of the fuel chamber, and closed by the wall 17 which is joined to the wall 24. rIhe cavity is preferably divided by a rib 20 (Fig. 2) into two vertically arranged passages 16, 16 which are closed laterally by the walls 19, 19, which extend downwardly to near the top of the stone 26 thus leaving openings at the bottom of the chamber. The space formed above the top 18 of the fuel chamber 6 is closed all around by a wall 21, provided with openings 22. In this way a circulation of air is possible which enters the passages 16, 16 at the bottom and, rising upwardly, passes over the top face 18 cooling the same, and escapes through the openings 22.

To the downwardly turned face of the wall 24 a fire-proof baflie stone 26 is secured which has to protect the lower end of this wall against the flame. In order to carry this baffle stone, the bottom end of the wall is bulged out (Figs. 2 and 5), forming a support 27 for the stone, wherein the stone is secured by filling the spatium with some fire-proof material 28. This arrangement makes it possible to replace the stone at any time and to introduce another one through the ash-pit.

What I claim as my invention and desire to secure by Letters Patent is:

1. A selffeeding stove having a fuel chamber, a burning chamber, a partition between said two chambers, upright channels which are in communication with each other in the upper part of the fuel chamber, one of said channels leading from below to the upper end of the fuel chamber, and the other of said channels leading from the upper part of the fuel chamber under the grate of the stove, and a closing means arranged at the upper part of the fuel chamber and adapted to close the passage between said last named channel and said fuel chamber to prevent air flowing downward through the fuel chamber.

2. A self feeding stove having a fuel chamber, a burning chamber, a partition between said two chambers, two upright channels formed in thel walls of the fuel chamber and communicating with each other in the upper part of said fuel chamber, one of said channels leading from below to the upper end of the fuel chamber and being provided at its lower end with means for regulating the entrance of the outer air, and the other of said channels leading from the upper part of the fuel chamber under the grate of the stove, and a damper arranged in the upper part of the fuel chamber and adapted to prevent air flowing upward through said second channel and down through the fuel chamber.

In testimony whereof I have-signed my name to this specification in the presence of 'two subscribing witnesses.

ADALBERT KURZWERNHART.

Witnesses:

FUG. F UGO REIK, ALvEsTo S. I-IoGUn.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

